From 0758fc3addcc74b4f8ef5a6467a6f573ef161c1f Mon Sep 17 00:00:00 2001
From: Randy Eckenrode <randy@largeandhighquality.com>
Date: Thu, 9 Apr 2026 19:58:13 -0400
Subject: [PATCH] darwin.libcxx: 20.1.0+apple-sdk-26.0 -> 21.1.6+apple-sdk-26.4

---
 pkgs/os-specific/darwin/by-name/li/libcxx/package.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/os-specific/darwin/by-name/li/libcxx/package.nix b/pkgs/os-specific/darwin/by-name/li/libcxx/package.nix
index dd5b8694518a..fce5590a1821 100644
--- a/pkgs/os-specific/darwin/by-name/li/libcxx/package.nix
+++ b/pkgs/os-specific/darwin/by-name/li/libcxx/package.nix
@@ -9,7 +9,7 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "libcxx";
   # Keep this in sync with the corresponding LLVM libc++ version
   # defined as `_LIBCPP_VERSION` in `usr/include/c++/v1/__config`.
-  version = "20.1.0+apple-sdk-${apple-sdk_26.version}";
+  version = "21.1.6+apple-sdk-${apple-sdk_26.version}";
   inherit (apple-sdk_26) src;
 
   dontConfigure = true;